badge4.c
上传用户:lgb322
上传日期:2013-02-24
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文件大小:5k
- /*
- * linux/arch/arm/mach-sa1100/badge4.c
- *
- * BadgePAD 4 specific initialization
- *
- * Tim Connors <connors@hpl.hp.com>
- * Christopher Hoover <ch@hpl.hp.com>
- *
- * Copyright (C) 2002 Hewlett-Packard Company
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/kernel.h>
- #include <linux/delay.h>
- #include <linux/tty.h>
- #include <linux/errno.h>
- #include <asm/hardware.h>
- #include <asm/setup.h>
- #include <asm/arch/irqs.h>
- #include <asm/mach/arch.h>
- #include <asm/mach/map.h>
- #include <asm/hardware/sa1111.h>
- #include <asm/mach/serial_sa1100.h>
- #include "generic.h"
- #include "sa1111.h"
- static int __init badge4_sa1111_init(void)
- {
- int ret;
- /*
- * Ensure that the memory bus request/grant signals are setup,
- * and the grant is held in its inactive state
- */
- sa1110_mb_disable();
- /*
- * Probe for SA1111.
- */
- ret = sa1111_probe(BADGE4_SA1111_BASE);
- if (ret < 0)
- return ret;
- /*
- * We found it. Wake the chip up.
- */
- sa1111_wake();
- /*
- * The SDRAM configuration of the SA1110 and the SA1111 must
- * match. This is very important to ensure that SA1111 accesses
- * don't corrupt the SDRAM. Note that this ungates the SA1111's
- * MBGNT signal, so we must have called sa1110_mb_disable()
- * beforehand.
- */
- sa1111_configure_smc(1,
- FExtr(MDCNFG, MDCNFG_SA1110_DRAC0),
- FExtr(MDCNFG, MDCNFG_SA1110_TDL0));
- /*
- * We only need to turn on DCLK whenever we want to use the
- * DMA. It can otherwise be held firmly in the off position.
- */
- SKPCR |= SKPCR_DCLKEN;
- /*
- * Enable the SA1110 memory bus request and grant signals.
- */
- sa1110_mb_enable();
- set_GPIO_IRQ_edge(BADGE4_GPIO_INT_1111, GPIO_RISING_EDGE);
- sa1111_init_irq(BADGE4_IRQ_GPIO_SA1111);
- return 0;
- }
- static int __init badge4_init(void)
- {
- int ret;
- if (!machine_is_badge4())
- return -ENODEV;
- ret = badge4_sa1111_init();
- if (ret < 0)
- printk(KERN_ERR __FUNCTION__
- ": SA-1111 initialization failed (%d)n", ret);
- /* N.B, according to rmk this is the singular place that GPDR
- should be set */
- /* Video expansion */
- GPCR = (BADGE4_GPIO_INT_VID | BADGE4_GPIO_LGP2 | BADGE4_GPIO_LGP3 |
- BADGE4_GPIO_LGP4 | BADGE4_GPIO_LGP5 | BADGE4_GPIO_LGP6 |
- BADGE4_GPIO_LGP7 | BADGE4_GPIO_LGP8 | BADGE4_GPIO_LGP9 |
- BADGE4_GPIO_GPA_VID | BADGE4_GPIO_GPB_VID |
- BADGE4_GPIO_GPC_VID);
- GPDR |= (BADGE4_GPIO_INT_VID | BADGE4_GPIO_LGP2 | BADGE4_GPIO_LGP3 |
- BADGE4_GPIO_LGP4 | BADGE4_GPIO_LGP5 | BADGE4_GPIO_LGP6 |
- BADGE4_GPIO_LGP7 | BADGE4_GPIO_LGP8 | BADGE4_GPIO_LGP9 |
- BADGE4_GPIO_GPA_VID | BADGE4_GPIO_GPB_VID |
- BADGE4_GPIO_GPC_VID);
- /* SDRAM SPD i2c */
- GPCR = (BADGE4_GPIO_SDSDA | BADGE4_GPIO_SDSCL);
- GPDR |= (BADGE4_GPIO_SDSDA | BADGE4_GPIO_SDSCL);
- /* uart */
- GPCR = (BADGE4_GPIO_UART_HS1 | BADGE4_GPIO_UART_HS2);
- GPDR |= (BADGE4_GPIO_UART_HS1 | BADGE4_GPIO_UART_HS2);
- /* drives CPLD muxsel0 input */
- GPCR = BADGE4_GPIO_MUXSEL0;
- GPDR |= BADGE4_GPIO_MUXSEL0;
- /* test points */
- GPCR = (BADGE4_GPIO_TESTPT_J7 | BADGE4_GPIO_TESTPT_J6 |
- BADGE4_GPIO_TESTPT_J5);
- GPDR |= (BADGE4_GPIO_TESTPT_J7 | BADGE4_GPIO_TESTPT_J6 |
- BADGE4_GPIO_TESTPT_J5);
- /* drives CPLD sdram type inputs; this shouldn't be needed;
- bootloader left it this way. */
- GPDR |= (BADGE4_GPIO_SDTYP0 | BADGE4_GPIO_SDTYP1);
- /* 5V supply rail. */
- GPCR = BADGE4_GPIO_PCMEN5V; /* initially off */
- GPDR |= BADGE4_GPIO_PCMEN5V;
- /* drives SA1111 reset pin; this shouldn't be needed;
- bootloader left it this way. */
- GPSR = BADGE4_GPIO_SA1111_NRST;
- GPDR |= BADGE4_GPIO_SA1111_NRST;
- return 0;
- }
- __initcall(badge4_init);
- static unsigned badge4_5V_bitmap = 0;
- void badge4_set_5V(unsigned subsystem, int on)
- {
- unsigned long flags;
- unsigned old_5V_bitmap;
- local_irq_save(flags);
- old_5V_bitmap = badge4_5V_bitmap;
- if (on) {
- badge4_5V_bitmap |= subsystem;
- } else {
- badge4_5V_bitmap &= ~subsystem;
- }
- /* detect on->off and off->on transitions */
- if ((!old_5V_bitmap) && (badge4_5V_bitmap)) {
- /* was off, now on */
- printk(KERN_INFO __FUNCTION__ ": enabling 5V supply railn");
- GPSR = BADGE4_GPIO_PCMEN5V;
- } else if ((old_5V_bitmap) && (!badge4_5V_bitmap)) {
- /* was on, now off */
- printk(KERN_INFO __FUNCTION__ ": disabling 5V supply railn");
- GPCR = BADGE4_GPIO_PCMEN5V;
- }
- local_irq_restore(flags);
- }
- EXPORT_SYMBOL(badge4_set_5V);
- static void __init
- fixup_badge4(struct machine_desc *desc, struct param_struct *params,
- char **cmdline, struct meminfo *mi)
- {
- /* nothing needed here */
- }
- static struct map_desc badge4_io_desc[] __initdata = {
- /* virtual physical length domain r w c b */
- {0xe8000000, 0x00000000, 0x02000000, DOMAIN_IO, 0,1,0,0},/* Flash bank 0 */
- {0xf1000000, 0x08000000, 0x00100000, DOMAIN_IO, 0,1,0,0},/* SRAM bank 1 */
- {0xf2000000, 0x10000000, 0x00100000, DOMAIN_IO, 0,1,0,0},/* SRAM bank 2 */
- {0xf4000000, 0x48000000, 0x00100000, DOMAIN_IO, 0,1,0,0},/* SA-1111 */
- LAST_DESC
- };
- static void __init badge4_map_io(void)
- {
- sa1100_map_io();
- iotable_init(badge4_io_desc);
- sa1100_register_uart(0, 3);
- sa1100_register_uart(1, 1);
- }
- MACHINE_START(BADGE4, "Hewlett-Packard Laboratories BadgePAD 4")
- BOOT_MEM(0xc0000000, 0x80000000, 0xf8000000)
- BOOT_PARAMS(0xc0000100)
- FIXUP(fixup_badge4)
- MAPIO(badge4_map_io)
- INITIRQ(sa1100_init_irq)
- MACHINE_END